Submission #367616

#	Time	Username	Problem	Language	Result	Execution time	Memory
367616		nicolaalexandra	Gift (IZhO18_nicegift)	C++14	100 / 100	1442 ms	101328 KiB

nicegift

#include <bits/stdc++.h>
#define DIM 1000010
using namespace std;

//set <pair<long long,int> > s;
priority_queue <pair<long long,int> > h;
vector <pair<long long,int> > w;
vector <long long> sol[DIM];
long long v[DIM];
int n,k,i,el;

int main (){

    //ifstream cin ("date.in");
    //ofstream cout ("date.out");

    cin>>n>>k;
    long long sum = 0;
    for (i=1;i<=n;i++){
        cin>>v[i];
        h.push(make_pair(v[i],i));
        sum += v[i];
    }

    if (sum % k){
        cout<<-1;
        return 0;
    }

    long long cnt = sum / k;

    while (!h.empty()){
        if (h.size() < k){
            cout<<-1;
            return 0;
        }

        int pas = 0; long long val = 0, val2 = 0;
        w.clear();

        for (int i=1;i<=k;i++){
            val = h.top().first;
            int poz = h.top().second;
            h.pop();
            w.push_back(make_pair(val,poz));
        }


        if (!h.empty())
            val2 = h.top().first;
        val = min (val,cnt - val2);

        sol[++el].push_back (val);
        cnt -= val;

        for (auto it : w){
            long long x = it.first; int poz = it.second;
            sol[el].push_back(poz);

            if (x > val)
                h.push(make_pair(x-val,poz));
        }
    }

    cout<<el<<"\n";
    for (i=1;i<=el;i++){
        for (auto it : sol[i])
            cout<<it<<" ";
        cout<<"\n";
    }


    return 0;
}

Compilation message (stderr)

nicegift.cpp: In function 'int main()':
nicegift.cpp:33:22: warning: comparison of integer expressions of different signedness: 'std::priority_queue<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   33 |         if (h.size() < k){
      |             ~~~~~~~~~^~~
nicegift.cpp:38:13: warning: unused variable 'pas' [-Wunused-variable]
   38 |         int pas = 0; long long val = 0, val2 = 0;
      |             ^~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 19 / 19
• Subtask 5: 51 / 51